The disclosure provides a pet grooming machine, which comprises a housing and a motor located within the housing. The housing includes an outer shell and an inner shell. The outer shell is provided with a first air inlet and a second air inlet, while the inner shell is equipped with a third air inlet, a fourth air inlet, and an air outlet located on the lower side of the inner shell. In the pet grooming machine of this utility model, when grooming a pet's fur, the motor starts to draw air from the first air inlet and the third air inlet into the housing and expel it from the air outlet of the inner shell. When the air duct is blocked, by pressing the inner shell, the second air inlet and the fourth air inlet become connected, and the first air inlet and the third air inlet are blocked.